Circuit and method for generating a ramp compensation voltage for a switching regulator
US8860395B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2012 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Jul 8, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a circuit and method of generating a ramp compensation voltage as might be used in a switching regulator. The ramp compensation voltage comprises: a charging current generating circuit configured to receive a switching signal having a frequency of fs, a duty cycle of D and a period of Ts, the charging current generating circuit generating a charging current in direct proportion toand a voltage generating circuit for generating a quadratic ramp compensation voltage by means of the charging current. The resulting ramp compensation voltage enables the switching regulator to operate over a broad range of duty cycles. The generated ramp compensation voltage has an amplitude as low as possible, the generated compensation slope approximates to the target compensation slope as close as possible, and over compensation at low duty cycles is reduced as far as possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.